[stdgy]

In the future, I suspect we'll see aftermarket outfitters touting externally facing audio equipment to imitate the sounds produced by high-powered combustion engines.

I also suspect the majority of them will be sold to teenagers with fairly under-powered vehicles ;)

[retroafroman]

The BMW M5 (an example of exactly what the Model S is competing against) already does this, because the interior cabin is so well insulated that you can't hear the turbocharged V-8, and owners want to: http://reviews.cnet.com/8301-13746_7-20111031-48/bmw-m5-gene...

[koenigdavidmj]

Actually this exists, but not for cosmetic reasons. Hybrid cars on their motors are just so silent that they're worried that someone (probably someone blind) will be hit by them.

[ricardobeat]

This already exists. The Nissan Leaf emits some cool sci-fi sounds by default, and I heard a dealer mention it can be replaced with a large selection of sounds by specialized auto shops.

[nfriedly]

If I ever get one, I totally want it to sound like the car on the Jetsons - https://www.youtube.com/watch?v=QdWswvLPdE0

[mrchucklepants]

The future version of the coffee can exhaust pipe.